package com.ruoyi.framework.web.service;

import cn.dev33.satoken.stp.StpUtil;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.exception.user.*;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.ServletUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.ip.AddressUtils;
import com.ruoyi.common.utils.ip.IpUtils;
import com.ruoyi.framework.manager.AsyncManager;
import com.ruoyi.framework.manager.factory.AsyncFactory;
import com.ruoyi.system.service.ISysConfigService;
import com.ruoyi.system.service.ISysUserService;
import eu.bitwalker.useragentutils.UserAgent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Set;

/**
 * 登录校验方法
 *
 * @author ruoyi
 */
@Component
public class SysLoginService {
    private static final Logger log = LoggerFactory.getLogger(SysLoginService.class);
    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysUserService userService;

    @Autowired
    private ISysConfigService configService;

    @Autowired
    private SysPermissionService permissionService;

    @Autowired
    private SysPasswordService passwordService;

    /**
     * 登录验证
     *
     * @param username 用户名
     * @param password 密码
     * @param code     验证码
     * @param uuid     唯一标识
     * @return 结果
     */
    public String login(String username, String password, String code, String uuid) {
        // 验证码校验
        validateCaptcha(username, code, uuid);
        // 登录前置校验
        loginPreCheck(username, password);

        // 用户验证
        SysUser user = null;
        try {
            // 查询用户信息
            user = userService.selectUserByUserName(username);
            if (StringUtils.isNull(user)) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.not.exists")));
                throw new UserNotExistsException();
            } else if (UserStatus.DELETED.getCode().equals(user.getDelFlag())) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.delete")));
                throw new ServiceException(MessageUtils.message("user.password.delete"));
            } else if (UserStatus.DISABLE.getCode().equals(user.getStatus())) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.blocked")));
                throw new ServiceException(MessageUtils.message("user.blocked"));
            }

            // 验证密码和重试次数限制
            passwordService.validate(user, username, password);

            // 获取用户权限信息
            Set<String> permissions = permissionService.getMenuPermission(user);
            LoginUser loginUser = new LoginUser(user.getUserId(), user.getDeptId(), user, permissions);

            // 使用SA-Token进行登录
            StpUtil.login(user.getUserId());

            // 设置token值到LoginUser对象
            String tokenValue = StpUtil.getTokenValue();
            loginUser.setToken(tokenValue);

            // 设置登录相关信息
            loginUser.setLoginTime(System.currentTimeMillis());
            String ipAddr = IpUtils.getIpAddr();
            loginUser.setIpaddr(ipAddr);
            loginUser.setLoginLocation(AddressUtils.getRealAddressByIP(ipAddr));

            // 获取客户端信息
            UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
            loginUser.setBrowser(userAgent.getBrowser().getName());
            loginUser.setOs(userAgent.getOperatingSystem().getName());

            // 将用户信息存储到会话中
            StpUtil.getSession().set(Constants.LOGIN_USER_KEY, loginUser);

            // 记录登录信息
            recordLoginInfo(user.getUserId());

            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));

            // 返回token
            return StpUtil.getTokenValue();
        } catch (Exception e) {
            if (e instanceof UserNotExistsException || e instanceof UserPasswordNotMatchException) {
                throw e;
            } else {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, "登录异常"));
                log.error("用户 {} 登录异常", username, e);
                throw new ServiceException("登录失败，请稍后重试");
            }
        }
    }

    /**
     * 校验验证码
     *
     * @param username 用户名
     * @param code     验证码
     * @param uuid     唯一标识
     * @return 结果
     */
    public void validateCaptcha(String username, String code, String uuid) {
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        if (captchaEnabled) {
            String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
            String captcha = redisCache.getCacheObject(verifyKey);
            if (captcha == null) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.expire")));
                throw new CaptchaExpireException();
            }
            redisCache.deleteObject(verifyKey);
            if (!code.equalsIgnoreCase(captcha)) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
                throw new CaptchaException();
            }
        }
    }

    /**
     * 登录前置校验
     *
     * @param username 用户名
     * @param password 用户密码
     */
    public void loginPreCheck(String username, String password) {
        // 用户名或密码为空 错误
        if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("not.null")));
            throw new UserNotExistsException();
        }
        // 密码如果不在指定范围内 错误
        if (password.length() < UserConstants.PASSWORD_MIN_LENGTH
                || password.length() > UserConstants.PASSWORD_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // 用户名不在指定范围内 错误
        if (username.length() < UserConstants.USERNAME_MIN_LENGTH
                || username.length() > UserConstants.USERNAME_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // IP黑名单校验
        String blackStr = configService.selectConfigByKey("sys.login.blackIPList");
        if (IpUtils.isMatchedIp(blackStr, IpUtils.getIpAddr())) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("login.blocked")));
            throw new BlackListException();
        }
    }

    /**
     * 记录登录信息
     *
     * @param userId 用户ID
     */
    public void recordLoginInfo(Long userId) {
        SysUser sysUser = new SysUser();
        sysUser.setUserId(userId);
        sysUser.setLoginIp(IpUtils.getIpAddr());
        sysUser.setLoginDate(DateUtils.getNowDate());
        userService.updateUserProfile(sysUser);
    }
}
